Can you top auto flowering plants

After a successful grow of auto ak48 and some onyx i have now got onyx, ak47, ak48 and some smurfberry going in.
I have been looking at some picks of peoples plants that have been topped for 2 or 4 main colas. Is it poss with auto's or is their lack of veg mean it won't work?
Any help most appreciated

They are good i got average of 2oz dry off my last lot, not very dusty. But still a nice smoke
Thought i'd try the ak48 this time aswell and see what the difference is.
I've got 8 onyx fems, 8 unsexed ak47, 5 fem ak48, 5 fem smurfberry and 10 fem big buddha fem auto's which are a new one.
The onyx is about 2 1\2 weeks old and they are in big bubble pots. They are about 6-7" with some massive fan leaves, got the ak47's in a flood and drain tank, they are still small only a week old but seem good. The other 20 are in an amazon aero tank and have tap roots and small shoots on all.
can't wait to see/smoke the end results